Gen 3 ignition coil tests

Chilidawg · Jul 19, 2023

My wife's car (2008 Outback 3.0 LL Bean) developed a misfire on 1 and 6. Roughly 149K on the odometer. Plugs were replaced around 3 years ago, but I can't recall the mileage.

I'd like to know what resistances I should see on the 3 terminals of the spark plug coil, and any other insights the group might have regarding this problem.

Thanks, folks

cardoc · Jul 19, 2023

There's no resistance values for this coil system in Subaru service manuals. You have a constant ground, constant power with the key on, and the trigger wire coming from the ECM. The wiring diagram above will show you that all the PIN numbers are the same as to their purpose.

Here's a video explaining how you could test it.

Chilidawg · Jul 19, 2023

Thank you for that, Cardoc. I was really hoping you'd chime in.

Gen 3 ignition coil tests

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